Dr. Michio Kaku

World-Renowned Futurist & Theoretical Physicist

Ellen DeGeneres

Award-Winning Comedian, TV Host, Actress & LGBTQ Activist

Tim Gunn

Fashion Icon, Former Co-Host & Mentor of "Project Runway"

Lamman Rucker

Actor, Education Activist, Green Living Advocate & Entrepreneur

Tamron Hall

Award-Winning Journalist; Former National News Anchor for NBC News; Host of the "Tamron Hall Show"

Watch Where They Hide

Winona LaDuke

Executive Director of Honor the Earth

Laura Dern

Actress, Director, Producer & Activist

Michael Chang

Retired Tennis Star & International Tennis Hall of Famer; Won the French Open at age 17; Author of "Holding Serve"

Alan Cumming

Emmy-Winning Actor Who Stars in "The Good Wife"

Vandana Shiva

World-Renowned Environmental Leader

Danny Trejo

Actor, Author, Activist & Restaurateur; Recovery & Intervention Counselor for Troubled Youth

Carrie Ann Inaba

"Dancing with the Stars" Judge, Founder of Carrie Ann Inaba Animal Project

Hazel O'Leary

Former Secretary of Energy

Portia de Rossi

Actress, Known for"Ally McBeal" & "Arrested Development."

Maggie Q

TV & Film Actress, Known for Lead Role in CW's "Nikita"

Leland Melvin

Engineer, Former NASA Astronaut & Former NFL Wide Receiver

Connie May Fowler

Connie May Fowler is a bestselling storyteller who believes in the transformative power of language.

Jerome Ringo

Jerome Ringo became national president of the Apollo Alliance in 2005, working diligently as a dedicated champion of environmental justice and a vocal advocate of clean energy.

Selenis Leyva

Cuban-American Actress Known for Her Role as Gloria in "Orange is the New Black"

Evelyn Lozada

Fashion Contributor, Fitness Blogger & Reality TV Personality